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Paper/patches/server/0949-Fix-possible-StackOverflowError-for-some-dispenses.patch
Bjarne Koll 77a5779e24
Updated Upstream (Bukkit/CraftBukkit/Spigot) (#11197) 
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
2ec53f49 PR-1050: Fix empty result check for Complex Recipes
10671012 PR-1044: Add CrafterCraftEvent
4d87ffe0 Use correct method in JavaDoc
ae5e5817 SPIGOT-7850: Add API for Bogged shear state
46b6d445 SPIGOT-7837: Support data pack banner patterns
d5d0cefc Fix JavaDoc error
b3c2b83d PR-1036: Add API for InventoryView derivatives
1fe2c75a SPIGOT-7809: Add ShieldMeta

CraftBukkit Changes:
8ee6fd1b8 SPIGOT-7857: Improve ItemMeta block data deserialization
8f26c30c6 SPIGOT-7857: Fix spurious internal NBT tag when deserializing BlockStateMeta
759061b93 SPIGOT-7855: Fire does not spread or burn blocks
00fc9fb64 SPIGOT-7853: AnvilInventory#getRepairCost() always returns 0
7501e2e04 PR-1450: Add CrafterCraftEvent
8c51673e7 SPIGOT-5731: PortalCreateEvent#getEntity returns null for nether portals ignited by flint and steel
d53d0d0b1 PR-1456: Fix inverted logic in CraftCrafterView#setSlotDisabled
682a678c8 SPIGOT-7850: Add API for Bogged shear state
fccf5243a SPIGOT-7837: Support data pack banner patterns
9c3bd4390 PR-1431: Add API for InventoryView derivatives
0cc6acbc4 SPIGOT-7849: Fix FoodComponent serialize with "using-converts-to" using null
2c5474952 Don't rely on tags for CraftItemMetas
20d107e46 SPIGOT-7846: Fix ItemMeta for hanging signs
76f59e315 Remove redundant clone in Dropper InventoryMoveItemEvent
e61a53d25 SPIGOT-7817: Call InventoryMoveItemEvent for Crafters
894682e2d SPIGOT-7839: Remove redundant Java version checks
2c12b2187 SPIGOT-7809: Add ShieldMeta and fix setting shield base colours

Spigot Changes:
fb8fb722 Rebuild patches
34bd42b7 SPIGOT-7835: Fix issue with custom hopper settings
2024-08-09 22:05:50 +02:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Sat, 29 Oct 2022 17:02:42 -0700
Subject: [PATCH] Fix possible StackOverflowError for some dispenses
For saddles, carpets, horse armor, and chests for horse-likes
a BlockDispenseEvent handler that always mutated the item without
changing the type would result in a SO error because when it went
to find the replacement dispense behavior (since the item "changed")
it didn't properly handle if the replacement was the same instance
of dispense behavior.
Additionally equippable mob heads, wither skulls, and carved pumpkins
are subject to the same possible error.
diff --git a/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
index 7826e2a52da47914aca39fef958b8f398a2ff937..0c0b8a49b3342cd015381c6a93fab23c32cd32e6 100644
--- a/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
+++ b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
@@ -239,7 +239,7 @@ public interface DispenseItemBehavior {
// Chain to handler for new item
ItemStack eventStack = CraftItemStack.asNMSCopy(event.getItem());
DispenseItemBehavior idispensebehavior = (DispenseItemBehavior) DispenserBlock.DISPENSER_REGISTRY.get(eventStack.getItem());
- if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != ArmorItem.DISPENSE_ITEM_BEHAVIOR) {
+ if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != this) { // Paper - fix possible StackOverflowError
idispensebehavior.dispense(pointer, eventStack);
return stack;
}
@@ -295,7 +295,7 @@ public interface DispenseItemBehavior {
// Chain to handler for new item
ItemStack eventStack = CraftItemStack.asNMSCopy(event.getItem());
DispenseItemBehavior idispensebehavior = (DispenseItemBehavior) DispenserBlock.DISPENSER_REGISTRY.get(eventStack.getItem());
- if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != ArmorItem.DISPENSE_ITEM_BEHAVIOR) {
+ if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != this) { // Paper - fix possible StackOverflowError
idispensebehavior.dispense(pointer, eventStack);
return stack;
}
@@ -369,7 +369,7 @@ public interface DispenseItemBehavior {
// Chain to handler for new item
ItemStack eventStack = CraftItemStack.asNMSCopy(event.getItem());
DispenseItemBehavior idispensebehavior = (DispenseItemBehavior) DispenserBlock.DISPENSER_REGISTRY.get(eventStack.getItem());
- if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != ArmorItem.DISPENSE_ITEM_BEHAVIOR) {
+ if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != this) { // Paper - fix possible StackOverflowError
idispensebehavior.dispense(pointer, eventStack);
return stack;
}
@@ -690,7 +690,7 @@ public interface DispenseItemBehavior {
OptionalDispenseItemBehavior dispensebehaviormaybe1 = new OptionalDispenseItemBehavior() {
@Override
protected ItemStack execute(BlockSource pointer, ItemStack stack) {
- this.setSuccess(ArmorItem.dispenseArmor(pointer, stack));
+ this.setSuccess(ArmorItem.dispenseArmor(pointer, stack, this)); // Paper - fix possible StackOverflowError
return stack;
}
};
@@ -744,7 +744,7 @@ public interface DispenseItemBehavior {
stack.shrink(1);
this.setSuccess(true);
} else {
- this.setSuccess(ArmorItem.dispenseArmor(pointer, stack));
+ this.setSuccess(ArmorItem.dispenseArmor(pointer, stack, this)); // Paper - fix possible StackOverflowError
}
return stack;
@@ -790,7 +790,7 @@ public interface DispenseItemBehavior {
stack.shrink(1);
this.setSuccess(true);
} else {
- this.setSuccess(ArmorItem.dispenseArmor(pointer, stack));
+ this.setSuccess(ArmorItem.dispenseArmor(pointer, stack, this)); // Paper - fix possible StackOverflowError
}
return stack;
@@ -918,7 +918,7 @@ public interface DispenseItemBehavior {
// Chain to handler for new item
ItemStack eventStack = CraftItemStack.asNMSCopy(event.getItem());
DispenseItemBehavior idispensebehavior = (DispenseItemBehavior) DispenserBlock.DISPENSER_REGISTRY.get(eventStack.getItem());
- if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != ArmorItem.DISPENSE_ITEM_BEHAVIOR) {
+ if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != this) { // Paper - fix possible StackOverflowError
idispensebehavior.dispense(pointer, eventStack);
return stack;
}
diff --git a/src/main/java/net/minecraft/world/item/ArmorItem.java b/src/main/java/net/minecraft/world/item/ArmorItem.java
index fb518f87cc4ccd810fb32cade2fdd7e09ab0abfc..647a4601deace52f8d855f512a73671f82b4762a 100644
--- a/src/main/java/net/minecraft/world/item/ArmorItem.java
+++ b/src/main/java/net/minecraft/world/item/ArmorItem.java
@@ -39,14 +39,20 @@ public class ArmorItem extends Item implements Equipable {
public static final DispenseItemBehavior DISPENSE_ITEM_BEHAVIOR = new DefaultDispenseItemBehavior() {
@Override
protected ItemStack execute(BlockSource pointer, ItemStack stack) {
- return ArmorItem.dispenseArmor(pointer, stack) ? stack : super.execute(pointer, stack);
+ return ArmorItem.dispenseArmor(pointer, stack, this) ? stack : super.execute(pointer, stack); // Paper - fix possible StackOverflowError
}
};
protected final ArmorItem.Type type;
protected final Holder<ArmorMaterial> material;
private final Supplier<ItemAttributeModifiers> defaultModifiers;
+ @Deprecated @io.papermc.paper.annotation.DoNotUse // Paper
public static boolean dispenseArmor(BlockSource pointer, ItemStack armor) {
+ // Paper start
+ return dispenseArmor(pointer, armor, null);
+ }
+ public static boolean dispenseArmor(BlockSource pointer, ItemStack armor, @javax.annotation.Nullable DispenseItemBehavior currentBehavior) {
+ // Paper end
BlockPos blockposition = pointer.pos().relative((Direction) pointer.state().getValue(DispenserBlock.FACING));
List<LivingEntity> list = pointer.level().getEntitiesOfClass(LivingEntity.class, new AABB(blockposition), EntitySelector.NO_SPECTATORS.and(new EntitySelector.MobCanWearArmorEntitySelector(armor)));
@@ -77,7 +83,7 @@ public class ArmorItem extends Item implements Equipable {
// Chain to handler for new item
ItemStack eventStack = CraftItemStack.asNMSCopy(event.getItem());
DispenseItemBehavior idispensebehavior = (DispenseItemBehavior) DispenserBlock.DISPENSER_REGISTRY.get(eventStack.getItem());
- if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != ArmorItem.DISPENSE_ITEM_BEHAVIOR) {
+ if (idispensebehavior != DispenseItemBehavior.NOOP && (currentBehavior == null || idispensebehavior != currentBehavior)) { // Paper - fix possible StackOverflowError
idispensebehavior.dispense(pointer, eventStack);
return true;
}
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